Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: Creating new spreadsheets with formulas and formatting, Reading or analyzing data, Modify existing spreadsheets while preserving formulas, Data analysis and visualization in spreadsheets, or Recalculating formulas.
/plugin marketplace add macnversion/skills/plugin install xlsx@mac-skillsPayload Development plugin - covers collections, fields, hooks, access control, plugins, and database adapters.
Schema validation, data quality monitoring, streaming validation pipelines, and input validation for backend APIs
Database migration automation, observability, and cross-database migration strategies
Modern Julia development with Julia 1.10+, package management, scientific computing, high-performance numerical code, and production best practices